Vaccine evaluation by case-control or prospective studies.
Comstock
G W
GW
Department of Epidemiology, Johns Hopkins University School of Hygiene and Public Health, Baltimore, MD.
D001500:BCG Vaccine / Q000008:administration & dosage*; D016022:Case-Control Studies; D004341:Drug Evaluation; D011446:Prospective Studies
D001500:BCG Vaccine